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Definitions

bacteria

[bak-teer-ee-uh] / bækˈtɪər i ə /
NOUN
microorganisms
Synonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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Although this sacrifice kills the individual cell, it prevents the virus from producing more copies and infecting nearby bacteria, helping protect the larger colony.

From Science Daily ● Oct. 31, 2026

CRISPR-Cas is best known for its role in modern gene-editing technologies, but bacteria originally evolved these systems as defenses against viruses.

From Science Daily ● Oct. 31, 2026

When this protein is broken apart, the barrier becomes compromised, potentially allowing harmful substances and bacteria to interfere with the surrounding tissue.

From Science Daily ● Oct. 31, 2026

Christine Wu, a researcher at the University of Illinois Chicago College of Dentistry, has been investigating whether cranberry juice could help protect teeth from harmful bacteria.

From Science Daily ● Oct. 29, 2026

Strict procedures would be followed to prevent new bacteria from infecting his body.

From "Ambushed!" by Gail Jarrow

Although the presence of this bacterium does not automatically mean someone will develop cancer, certain strains produce a powerful toxin capable of disrupting the colon's protective lining, causing inflammation, and encouraging tumor growth.

From Science Daily ● Oct. 31, 2026

Instead of preventing an existing toxin from causing harm, it helps turn on toxin production only when the bacterium detects a threat.

From Science Daily ● Oct. 31, 2026

The bacterium that causes it still exists in parts of Africa and Asia, including Siberia.

From The Wall Street Journal ● Oct. 30, 2026

Plague is a disease caused by the Yersinia pestis bacterium, the same pathogen that killed millions of people in Europe during the Middle Ages.

From Barron's ● Oct. 7, 2026

Agricultural use of insect diseases, caused by a bacterium highly specific for certain lypes of insects, is already being tried in California, and more extended tests of this method are under way.

From "Silent Spring" by Rachel Carson


Vocabulary lists containing bacteria

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